2001 TOYOTA HIGHLANDER sensor

Z17008
CSHORT
1
2B
1
21
2 A
Fig. 5
Z17009
Fig. 6
Sensor
C
BA
ECU
1
21
22 1
- INTRODUCTIONHOW TO TROUBLESHOOT ECU CONTROLLED
SYSTEMS01-39
39 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
(2) Example results:
Tester ConnectionSpecified Condition
Connector A terminal 1 -
Body ground5 V
Connector B terminal 1 -
Body ground5 V
Connector C terminal 1 -
Body ground0 V
If your results match the examples above, an open circuit exists
in the wire harness between terminal 1 of B and terminal 1 of
C.
3. CHECK SHORT CIRCUIT
(a) If the wire harness is ground shorted (Fig. 5), locate the
section by conducting a resistance check with the body
ground (below).
(b) Check the resistance with the body ground.
(1) Disconnect connectors A and C and measure the
resistance between terminals 1 and 2 of connector
A and the body ground.
Resistance: 10 kW or higher
HINT:
Measure the resistance while lightly shaking the wire harness
vertically and horizontally.
Fig. 6:
Tester ConnectionSpecified Condition
Connector A terminal 1 -
Body groundBelow 1 kW
Connector A terminal 2 -
Connector C terminal 210 kW or higher
If your results match the examples above, a short circuit exists
between terminal 1 of connector A and terminal 1 of connector
C.

Z17808
Fig. 7
Sensor
B2
A
11 1
C
B1
1ECU
2
222
IN0383
Example
Ground
IN0384
Ground ECU Side
W/H Side
Ground
01-40- INTRODUCTIONHOW TO TROUBLESHOOT ECU CONTROLLED
SYSTEMS
40 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
(2) Disconnect connector B and measure the resis-
tance between terminal 1 of connector A and the
body ground, and terminal 1 of connector B2 and
the body ground.
Fig. 7:
Tester ConnectionSpecified Condition
Connector A terminal 1 -
Body ground10 kW or higher
Connector B2 terminal 1 -
Body groundBelow 1 kW
If your results match the examples above, a short
circuit exists between terminal 1 of connector B2
and terminal 1 of connector C.
4. CHECK AND REPLACE ECU
NOTICE:

The connector should not be disconnected from the
ECU. Perform the inspection from the backside of the
connector on the wire harness side.

When no measuring condition is specified, perform
the inspection with the engine stopped and the igni-
tion switch ON.

Check that the connectors are fully seated. Check for
loose, corroded or broken wires.
(a) First check the ECU ground circuit. If it is faulty, repair it.
If it is normal, the ECU could be faulty. Replace the ECU
with a normal functioning one and check if the symptoms
occur. If the trouble symptoms stop, replace the ECU.
(1) Measure the resistance between the ECU ground
terminal and body ground.
Resistance: Below 1 W
(2) Disconnect the ECU connector. Check the ground
terminals (on the ECU side and wire harness side)
for evidence of bending, corrosion or foreign materi-
al. Lastly check the contact pressure of the female
terminals.

i
2005 HIGHLANDER Navigation from Aug. '04 Prod. (OM48539U)
Introduction
Thank you for your purchase of the Navigation System. Please read this manual carefully to ensure proper use. Keep this manual
in your vehicle at all times.
The Navigation System is one of the most technologically advanced vehicle accessories ever developed. The system receives satellite signals
from the Global Positioning System (GPS) operated by the U.S. Department of Defense. Using these signals and other vehicle sensors, the
system indicates your present position and assists in locating a desired destination.
The navigation system is designed to select efficient routes from your present starting location to your destination. The system is designed
to direct you to a destination that is unfamiliar to you in an efficient manner. The system uses the maps of DENSO. The calculated routes
may not be the shortest nor the least traffic congested. Your own personal local knowledge or short cutº may at times be faster than the calcu-
lated routes.
The navigation system's database includes about 75 Point of Interest categories to allow you to easily select destinations such as restaurants
and banks. If a destination is not in the database, you can enter the street address or a major intersection close to it and the system will guide
you there. The system will provide both a visual map and audio instructions. The audio instructions will announce the distance remaining
and the direction to turn in approaching a fork or intersection. These voice instructions will help you keep your eyes on the road and are timed
to provide enough time to allow you to maneuver, change lanes or slow down.
Please be aware that all current vehicle navigation systems have certain limitations that may affect their ability to perform properly.
The accuracy of the vehicle's position depends on the satellite condition, road configuration, vehicle condition or other circumstan-
ces. For more information on the limitations of the system, refer to pages 9 through 11.

01-10
- INTRODUCTIONREPAIR INSTRUCTION
10 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
1. FOR VEHICLES EQUIPPED WITH SRS AIRBAG AND SEAT BELT PRETENSIONER
HINT:
The HIGHLANDER is equipped with a Supplemental Restraint System (SRS) and seat belt pretensioner.
Failure to carry out the service operations in the correct sequence could cause the SRS to unexpectedly
deploy during servicing and lead to serious injury.
Furthermore, if a mistake is made when servicing the SRS, it is possible that the SRS may fail to operate
properly. Before servicing (including removal or installation of parts, inspection or replacement), be sure to
read the following section carefully.
(a) GENERAL NOTICE
(1) Malfunction symptoms of the SRS are difficult to confirm so the Diagnostic Trouble Codes (DTCs)
become the most important source of information when troubleshooting. When troubleshooting
the SRS, always check the DTCs before disconnecting the battery (see page 05-1215).
(2) To avoid serious injury, servicing the SRS must be started at least 90 seconds after:

The ignition switch is turned to the LOCK position.

The negative (-) terminal cable is disconnected from the battery.
(The SRS is equipped with a back-up power source. If work is started within 90 seconds of dis-
connecting the negative (-) terminal cable from the battery, the SRS may deploy.)
Disconnecting the negative (-) terminal cable will erase the memory of all vehicle systems. Initial-
ize the systems after disconnecting/reconnecting the cable.
CAUTION:
Never use a back-up power source (battery or other) in an attempt to avoid erasing system memory.
The back-up power source inadvertently may inadvertently power the SRS and cause it to deploy.
(3) In minor collisions where the SRS does not deploy, the horn button assembly, instrument panel
passenger airbag assembly, front seat airbag assembly, curtain shield airbag assembly and seat
belt pretensioner should be inspected before further use of the vehicle (see pages 60-19,
60-31, 60-40, 60-46, and 61-8).
(4) Never use SRS parts from another vehicle. When replacing parts, use new parts.
(5) Before repairs, remove the airbag sensor if impacts are likely to be applied to the sensor during
repairs.
(6) Never disassemble and repair the airbag sensor assembly, horn button assembly, instrument
panel passenger airbag assembly, front seat airbag assembly, curtain shield airbag assembly
or seat belt pretensioner.
(7) Replace the center airbag sensor assembly, side airbag sensor assembly, horn button assembly
or the instrument panel passenger airbag assembly, front seat airbag assembly or curtain shield
airbag assembly if: 1) damage has occurred from being dropped, or 2) cracks, dents or other
defects in the case, bracket or connector are present.
(8) Do not directly expose the airbag sensor assembly, the horn button assembly, the instrument
panel passenger airbag assembly, front seat airbag assembly, the curtain shield airbag assem-
bly or the seat belt pretensioner to hot air or flames.
(9) Use a voltmeter/ohmmeter with high impedance (10 kW/V minimum) for troubleshooting electri-
cal circuits.
(10) Information labels are attached to the SRS components. Follow the instructions on the labels.
(11) After work on the SRS is completed, check the SRS warning light (see page 05-1207).

D30924
Example:
NEVER USE AN OHMMETER ON AN AIRBAG OR PRETENSIONER
D30370
Example:
NEVER USE AN OHMMETER ON AN AIRBAG OR PRETENSIONER 01-14
- INTRODUCTIONREPAIR INSTRUCTION
14 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
(g) SEAT BELT PRETENSIONER
(1) Never measure the resistance of the seat belt pretensioner. This may cause the seat belt preten-
sioner to activate, which is very dangerous.
(2) Never disassemble the seat belt pretensioner.
(3) Never install the seat belt pretensioner on another vehicle.
(4) Store the seat belt pretensioner in area where the ambient temperature is below 80°C (176°F),
the humidity is not high and electrical noise is not nearby.
(5) When using electric welding anywhere on the vehicle, disconnect the airbag ECU connectors
(2 pins). These connectors contain shorting springs. This feature reduces the possibility of the
airbag deploying due to currents entering the squib wiring.
(6) When disposing of a vehicle or the seat belt pretensioner unit by itself, the seat belt pretensioner
should be activated before disposal (see page 61-8). Activate in a safe place away from electri-
cal noise.
(7) The seat belt pretensioner is hot after being activated, so allow some time for it to cool down suffi-
ciently before disposal. Never apply water to cool down the seat belt pretensioner.
(8) Oil or water should not be put on the front seat outer belt, and the front seat outer belt should
not be cleaned with detergents of any kind.
(h) AIRBAG SENSOR ASSEMBLY
(1) Never reuse an airbag sensor assembly that has been involved in a collision where the SRS has
deployed.
(2) The connectors to the airbag sensor assembly should be connected or disconnected with the
sensor mounted on the floor. If the connectors are connected or disconnected while the airbag
sensor assembly is not mounted to the floor, it could cause accidental deployment of the SRS.
(3) Work must be started at least 90 seconds after the ignition switch is turned to the LOCK position
and the negative (-) terminal cable is disconnected from the battery, even if only loosening the
set bolts of the airbag sensor assembly.

D25080
Negative (-)
Terminal
D31751
INCORRECT
- INTRODUCTIONREPAIR INSTRUCTION
01-15
15 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
(i) WIRE HARNESS AND CONNECTOR
(1) The SRS wire harness is integrated with the instrument panel wire harness assembly. All the con-
nectors in the system are a standard yellow color. If the SRS wire harness becomes discon-
nected or the connector becomes broken, repair or replace it.
2. ELECTRONIC CONTROL
(a) REMOVAL AND INSTALLATION OF BATTERY TERMI-
NAL
(1) Before performing electronic work, disconnect the
battery negative (-) terminal cable beforehand to
prevent component and wire damage caused by
accidental short circuits.
(2) When disconnecting and installing the terminal
cable, turn the ignition switch and lighting switch
OFF and loosen the terminal nut completely. Per-
form these operations without twisting or prying the
terminal. Remove the battery cable from battery
post.
(3) Clock settings, radio settings, DTCs and other data
are erased when the battery cable is removed. Be-
fore removing the battery cable, record any neces-
sary data.
(4) When disconnecting the battery's negative (-) ter-
minal cable, re-initialize the following systems after
the completion of the operation.
(b) HANDLING OF ELECTRONIC PARTS
(1) Do not open the cover or case of the ECU unless
absolutely necessary. If the IC terminals are
touched, the IC may be rendered inoperative by
static electricity.
(2) To disconnect electronic connectors, pull the con-
nector itself, not the wires.
(3) Be careful not to drop electronic components, such
as sensors or relays. If they are dropped on a hard
floor, they should be replaced.
(4) When cleaning the engine with steam, protect the
electronic components, air filter and emission-re-
lated components from water.
(5) Never use an impact wrench to remove or install
temperature switches or temperature sensors.
(6) When checking the continuity at the wire connector,
insert the tester probe carefully to prevent terminals
from bending.

D01563
D25081
Spring Type Clamp
Clamp Track
D20025
01-16
- INTRODUCTIONREPAIR INSTRUCTION
16 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
3. REMOVAL AND INSTALLATION OF FUEL CONTROL PARTS
(a) PLACE FOR REMOVING AND INSTALLING OF FUEL SYSTEM PARTS
(1) Work in a place with good air ventilation and without any ignition sources, such as a welder, grind-
er, drill, electric motor or stove.
(2) Never work in a place such as a pit or near a pit because vaporized fuel will collect in those places.
(b) REMOVING AND INSTALLING OF FUEL SYSTEM PARTS
(1) Prepare a fire extinguisher before starting operation.
(2) To prevent static electricity, install a ground on the fuel changer, vehicle and fuel tank, and do
not spray the area with water. The work surface will become slippery. Do not clean up spills with
water as this will spread and gasoline and create a fire hazard.
(3) Never use any electric equipment like an electric motor or a working light, as they may create
sparks or high temperatures.
(4) Never use an iron hammer, as it may create sparks.
(5) Dispose of fuel-contaminated shop rags separately using a fire resistant container.
4. REMOVAL AND INSTALLATION OF ENGINE INTAKE
PARTS
(a) If any metal particle enters the inlet pass, this may dam-
age the engine.
(b) When removing and installing the inlet system parts, cov-
er the openings of the removed parts and engine open-
ings. Use clean shop rags, gummed tape, or other suit-
able materials.
(c) When installing the inlet system parts, check that no metal
particles have entered the engine or the installed part.
5. HANDLING OF HOSE CLAMPS
(a) Before removing the hose, check the clamp position so
that you can restore it in the same way.
(b) Replace deformed or dented clamps with new ones.
(c) When reusing a hose, attach the clamp on the clamp track
portion of the hose.
(d) For a spring type clamp, to spread the tabs slightly after
installation by pushing in the direction of the arrow marks
as shown in the illustration.
6. FOR VEHICLES EQUIPPED WITH MOBILE COMMU-
NICATION SYSTEMS
(a) Install the antenna as far away from the ECU and sensors
of the vehicle electronic systems as possible.
(b) Install an antenna feeder at least 20 cm (7.87 in.) away
from the ECU and sensors of the vehicle electronic sys-
tems. For details of the ECU and sensors locations, refer
to the section on applicable components.
(c) Keep the antenna and feeder separate from other wirings
as much as possible. This will prevent signals from the
communication equipment from affecting vehicle equip-
ment and vice-versa.
(d) Check that the antenna and feeder are correctly adjusted.
(e) Do not install any high-powered mobile communication
system.

- INTRODUCTIONTERMS
01-47
47 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U) HO2S
Heated Oxygen SensorHeated Oxygen Sensor (HO2S)
IACIdle Air ControlIdle Speed Control (ISC)
IATIntake Air TemperatureIntake or Inlet Air Temperature
ICMIgnition Control Module-
IFIIndirect Fuel InjectionIndirect Injection (IDL)
IFSInertia Fuel-Shutoff-
ISCIdle Speed Control-
KSKnock SensorKnock Sensor
MAFMass AirflowAir Flow Meter
MAPManifold Absolute PressureManifold Pressure Intake Vacuum
MCMixture Control
Electric Bleed Air Control Valve (EBCV)
Mixture Control Valve (MCV)
Electric Air Control Valve (EACV)
MDPManifold Differential Pressure-
MFIMultiport Fuel InjectionElectronic Fuel Injection (EFI)
MILMalfunction Indicator LampCheck Engine Lamp
MSTManifold Surface Temperature-
MVZManifold Vacuum Zone-
NVRAMNon-V olatile Random Access Memory-
O2SOxygen SensorOxygen Sensor, O2 Sensor (O2S)
OBDOn-Board DiagnosticOn-Board Diagnostic System (OBD)
OCOxidation Catalytic ConverterOxidation Catalyst Convert (OC), CCo
OLOpen LoopOpen Loop
PAIRPulsed Secondary Air InjectionAir Suction (AS)
PCMPowertrain Control Module-
PNPPark/Neutral Position-
PROMProgrammable Read Only Memory-
PSPPower Steering Pressure-
PTOXPeriodic Trap OxidizerDiesel Particulate Filter (DPF)
Diesel Particulate Trap (DPT)
RAMRandom Access MemoryRandom Access Memory (RAM)
RMRelay Module-
ROMRead Only MemoryRead Only Memory (ROM)
RPMEngine SpeedEngine Speed
SCSuperchargerSupercharger
SCBSupercharger BypassE-ABV
SFISequential Multiport Fuel InjectionElectronic Fuel Injection (EFI), Sequential Injection
SPLSmoke Puff Limiter-
SRIService Reminder Indicator-
SRTSystem Readiness Test-
STScan Tool-
TBThrottle BodyThrottle Body
TBIThrottle Body Fuel InjectionSingle Point Injection
Central Fuel Injection (Ci)
TCTurbochargerTurbocharger
TCCTorque Converter ClutchTorque Converter